The OptiMate 20W Solar Duo Pulse Charger, Tester & Maintainer Car Kit helps you keep your 12V battery charged, maintained and monitored using solar power. You use its 20W polycrystalline panel, pulse-charging controller and automated multi-stage programme to manage both lead-acid and lithium LFP batteries throughout daily and overnight cycles.Discover the key features of this kit:20W Polycrystalline Solar Panel: The 20W polycrystalline module uses high-intensity solar cells mounted in a weatherproof aluminium frame with four integrated brackets and a 200cm SAE output cable, allowing you to capture consistent solar input in outdoor conditions and deliver a stable power supply to support regular battery maintenance.TM522-D2 Smart Charger-Controller: The TM522-D2 features a 2A output, six-step charging programme (Test, Save, Charge, Optimise, Maintain, Monitor) and a 5-LED display, using voltage interpretation and automated control logic to match the charge to battery type and condition s